Dynamo-electric machine.



W/Zne sses; w v grw- Campbeu, Macm ban PATENTED. APR. 16, 1907. 0. MACMILLAN. DYNAMO ELECTRIC MACHINE.

A P P L I O A T I 0 N F I L E D M A Y 2 5 1 9 0 6.

W I Atty.

J it i. Juli OAlliPBELL ii UiCMlLLAN 0F Ci-LEN 7 GENERAL ELE'CTYLC {IQ-IV Piilli A iii Letters ant.

@PORATION OF NEW Patented April 16,

Application filed May 25,1906. Serial Nuv S'iSflZS.

the use of e commutator end which is adapted for operation on high voltages. To

secure these results, .I employ a construction of the unipolar type, comprising arevolving armature, preferably carrying conductors.

and a stationary ring-shaped core adjacent to the conductors provided with coils, the terminals of which are connected to brushes hearing on the ends of the arinatureconductors so to form therewith a closed secondary Winding around the core. i: then pro- Vide a prim: winding arranged to produce it circumferential ilux around the core tl \rending the secondary Winding, sons to induce current therein, and arrange either the primary or secondary winding, or hoth, so as to produce a second flux perpendicular to the erinaturc-conductors and their direction of motion. With this construction the ringshaped core acts as a transFormer-core. The primary Winding may be adapted for connection to e higlnvoltage course, Wl'illO the secondary Winding carries large currents at low voltage, which iiass through the erniatineconductors. The flux perpendicular to these conductors and to their direction of motion coacting with the induced secondary currents in the arniatru'e-conductors produces rota-- tion when. the machine is operated as a motor. it will be seen that this machine as a motor possessess ries characteristics sud may be controlled as to speed and torque simply by ysrying the voltage applied to the primary WJIIClHI My invention Wlll best he understood by reference to the accompanying drawings, in which igure 1 shows :1 side elevation, partly in fi cross-section, of a machine arranged in accordence with my invention; and Fig. 2

shows end elevation of the some.

in the gs, Are presents the ernie ture, which is iinated mini one. can ries the armature-condor;tors B. 'ihesel conrhictors may consist of flat plates or strips extending around the armature, but intern i oted st two or more points by pieces or"; insul es indicated Z; in Fig. 2, l ridged simultaneously by th e0 so to prevent the how of short rents due to the trai'isfori'ner not-ion oi the motor l'lux. oi the machine. Q represent two stationery ring-shaped cores also inter more i at one or more points, as indicated at which surrounds the arlnature-eonductors B and which carry the coils D, the terminals of which provided with brushes d, hearing pen the arinature-cornluctors These coils i may consist simply of three-quarters of a turn, as shown in Fig. l, the fourth side oi the coil being formed by the arniaturc-oon ductor. These coils, together with the arnrature-conductors, form a plurality of closed circuits surrouinlii'ig the core i) and act as a secondary winding. The core C also carries the "primary windirg E, which by he iug properly insulated may he adapted for connection to a source 0i. high voltage and which is arranged to produce a circunn' ierential ilUX in the core (3, threading the secondary Winding, so as to induce currents therein. The primary and secondary coils E and are arranged on the core at an angle to each oth as clearly snown in Fig. 2, so that the currents in the two coils assist each other in producing radial llux which passes from one core (J radially inward, cutting on armatureconductor B, then axial y through the arn1a-.

ture A, outward. through the other core (I, and back in an axial direction through the held-magnet F, which is axially laminated and supports the two cores C. it will be seen that this radial flux. cutting the airmature-coinluctors, in conjunction with the current in the armature-cornluctors induced by tinnslornier action in the secondary wiinling, will produce torque, and that this torque will be proportional to the radial flux. and to the erniature-current. Consequently the torque of the machine will be proportional to the square of the impressed voltage, so that the machine will have the characteristics of the usual series motor and may be con 'olled simply hy varying the voltage impressed on the primary Winding.

While I have shown Tooth primary and secondaryv/indings arranged to assist in producing the 'rnotor flux. of the machine, it is obvious that the cooperation of the two Wind ings is not essential for this purpose. it is su'liicient if either Winding is arranged soas to include conductors extending ;in the circuini erentia-l' direction With respect to. the armature, and it is not necessary that the same conductors should be active in producing both transformer and motor flux out, on the contrary, these two actions may be sepa rated, as Will: be obvious to those skilled in the art. it is only essential that the Winch ings should be .so arranged as to produce, first, a transformer-flux threading the closed secondary Winding, and, second, a motor flux per endicu-lar to the armature-conductors and their direction of motion. Furthermore, although. I have shown an armature of the drum ty e other. types may be 'em ployed, preierred. Consequently do not desire to limit myself to the particular construction and arrangement of )Zl-l'llS here shown, but, aim in the appended claims to cover all modifications which are Within the soc e of my invention.

di l-int I claim as new, and desire to secure by Letters Patented the United States, is-

1 An alternatingrcurrent unipolar machine, comprising a *revolyin armature, a stationary ring-shaped core acent tosard armature, coils carried'hy said core provided with brushes'engaging'said armature so as to form therewith a closed Winding around said. core,- and means for producing a c rcumferential flux in said core for inducing current in said closed Winding and a flux perpendicular to the surface of the armature between said lmishes. v

A11 alternating-current unipolar ma chine, comprising a rave ing. arinatrn. .st'a

I ti'onary code provided with brushes engagingsaid so as. to form therewi h a closed secondary Winding, and a primary Winding; arranged to induce current in said secondary Winding, at least one of said windings'i'icluding conductors extending circumferentially With'respect to said armature so as to produce a 'lluX perpendicular to the surface of said armature between saidbrushes.

3. An alternatingcurrent unipolar machine, comprising a revolving armature, a stationary ring-shaped core adjacent to said or mature, coils carried by said core provided with brushes engaging said armature so as to form therewith a closed secondary Winding around said core, and a primary Winding; arranged to produce a circumferential flux in said core threading said secondary Winding, one at least of said windings including conductors extending circumforentially with respect ssid armature so as to produce a flux perpendicular toth-e surface of seid armature etweensaid brushes Winding, and a primary Wint An al.ternating-current unipolar machine, com prising a revolving armature, conductors carried hllGlGbY, a stationary ring shaped core adjacent to said conductors, coils carried by said core provided with brushes engaging said conductors so to form therewith a closed Winding around said core, and means'forproducing a circumiereri tial flux in said core fr inducing current in said closed Winding and a flux perpendicular to said conductors and their direction of motio i. I

5. An alternating-cirrrent unipolar machine, comprising a revolving armature, conductors carried thereby, a'stationary ringshaped core adjacent to said conductors, coils carried by said core provided with crushes engaging said'conductors so as to form therewith. a closed secondary winding around said core, and a primary Winding arranged to produce a circumferential flux in said core threading said secondary Winding, said windings being arranged to produce a flu perpendicular to said conductors and their direction of motion.

6. alternating current unipolar machine, comprising a revolving armature, conductors carried thereby, stationary coils pro' vided with brushes engaging sald conductors so as to form therewith a pl ality of closed circuits, and means for rc'ulucingv a transformer flux threading" sai circuits so as to inducecurrent therein and arnotor flux erpendicuiar to said conductors and their direction of motion.

7. [in alternatingcurrent unipolar ma chine, comprising a revolving armature; conductors carried thereby, a stationary ringshaped coreadjacent to said conductors,

coils carried by said core provided With crushes engaging said conductorsso as to formtherewith. a closed secondary Winding around said core, and a around said core, said primary and seeond-' arywinding being arranged an angle to each. other; on said core so as to produce a component flux. perpendicular to said con-- ductors and'their direction motion.

"'8. An alternating-current unipolar ma chine, comprising a revclvi m armature, con ductors carried thereby, stationary coils provided with brushes engaging said conductors so as to form therewitlra closed secondary r" arranged to induce current in said seco: least one of said u idings tors attending circunrferc spect to sa.. d 'perpendicula direction of motion.

9. An-alter.i1ating'- current unipolar mee, comprising a reyolving drun1-ar1naamine icing conduclly with rco ns ture produce a iluz; 'cl conductors and to their ed axial. planes conductors carried there stationary held-magnet laminated in axial planes, aringshaped core y Winding, at

primary inding y ture laminated in axial planes, conductors l l q l l 1 carried thereby, a stationary field-magnet laminated in axial planes, a ring-shaped core i laminated in planes perpendicular to the aXis carried by said field-magnet and surrounding/i the armature-conductors, coils carried by said core provided With brushes engaging said conductors so as to form therewith a closed secondary Winding around said core, and a primary Winding arranged to produce a circumferential flux in said core threading the secondary winding, at least one of said windmgs including conductors extendlng circumferentially so as to produce a radial flux cutting the armature-conductors.

In Witness whereof I have hereunto set my hand this 24th day of May, 1906.

CAMPBELL MACMILLAN.

Witnesses:

BENJAMIN B. llULL, HELEN Onron'n. 

